1 files changed, 92 insertions, 0 deletions
diff --git a/node_modules/sucrase/dist/esm/util/getImportExportSpecifierInfo.js b/node_modules/sucrase/dist/esm/util/getImportExportSpecifierInfo.js
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+import {TokenType as tt} from "../parser/tokenizer/types";
+
+
+ 
+
+
+
+
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+
+
+
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+
+
+
+/**
+ * Determine information about this named import or named export specifier.
+ *
+ * This syntax is the `a` from statements like these:
+ * import {A} from "./foo";
+ * export {A};
+ * export {A} from "./foo";
+ *
+ * As it turns out, we can exactly characterize the syntax meaning by simply
+ * counting the number of tokens, which can be from 1 to 4:
+ * {A}
+ * {type A}
+ * {A as B}
+ * {type A as B}
+ *
+ * In the type case, we never actually need the names in practice, so don't get
+ * them.
+ *
+ * TODO: There's some redundancy with the type detection here and the isType
+ * flag that's already present on tokens in TS mode. This function could
+ * potentially be simplified and/or pushed to the call sites to avoid the object
+ * allocation.
+ */
+export default function getImportExportSpecifierInfo(
+  tokens,
+  index = tokens.currentIndex(),
+) {
+  let endIndex = index + 1;
+  if (isSpecifierEnd(tokens, endIndex)) {
+    // import {A}
+    const name = tokens.identifierNameAtIndex(index);
+    return {
+      isType: false,
+      leftName: name,
+      rightName: name,
+      endIndex,
+    };
+  }
+  endIndex++;
+  if (isSpecifierEnd(tokens, endIndex)) {
+    // import {type A}
+    return {
+      isType: true,
+      leftName: null,
+      rightName: null,
+      endIndex,
+    };
+  }
+  endIndex++;
+  if (isSpecifierEnd(tokens, endIndex)) {
+    // import {A as B}
+    return {
+      isType: false,
+      leftName: tokens.identifierNameAtIndex(index),
+      rightName: tokens.identifierNameAtIndex(index + 2),
+      endIndex,
+    };
+  }
+  endIndex++;
+  if (isSpecifierEnd(tokens, endIndex)) {
+    // import {type A as B}
+    return {
+      isType: true,
+      leftName: null,
+      rightName: null,
+      endIndex,
+    };
+  }
+  throw new Error(`Unexpected import/export specifier at ${index}`);
+}
+
+function isSpecifierEnd(tokens, index) {
+  const token = tokens.tokens[index];
+  return token.type === tt.braceR || token.type === tt.comma;
+}